sing-box/transport/v2rayhttp/server.go

172 lines
4.9 KiB
Go

package v2rayhttp
import (
"context"
"net"
"net/http"
"os"
"strings"
"time"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/tls"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/buf"
"github.com/sagernet/sing/common/bufio"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
aTLS "github.com/sagernet/sing/common/tls"
sHttp "github.com/sagernet/sing/protocol/http"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
)
var _ adapter.V2RayServerTransport = (*Server)(nil)
type Server struct {
ctx context.Context
tlsConfig tls.ServerConfig
handler adapter.V2RayServerTransportHandler
httpServer *http.Server
h2Server *http2.Server
h2cHandler http.Handler
host []string
path string
method string
headers http.Header
}
func NewServer(ctx context.Context, options option.V2RayHTTPOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) {
server := &Server{
ctx: ctx,
tlsConfig: tlsConfig,
handler: handler,
h2Server: &http2.Server{
IdleTimeout: time.Duration(options.IdleTimeout),
},
host: options.Host,
path: options.Path,
method: options.Method,
headers: options.Headers.Build(),
}
if !strings.HasPrefix(server.path, "/") {
server.path = "/" + server.path
}
server.httpServer = &http.Server{
Handler: server,
ReadHeaderTimeout: C.TCPTimeout,
MaxHeaderBytes: http.DefaultMaxHeaderBytes,
BaseContext: func(net.Listener) context.Context {
return ctx
},
}
server.h2cHandler = h2c.NewHandler(server, server.h2Server)
return server, nil
}
func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
if request.Method == "PRI" && len(request.Header) == 0 && request.URL.Path == "*" && request.Proto == "HTTP/2.0" {
s.h2cHandler.ServeHTTP(writer, request)
return
}
host := request.Host
if len(s.host) > 0 && !common.Contains(s.host, host) {
s.invalidRequest(writer, request, http.StatusBadRequest, E.New("bad host: ", host))
return
}
if !strings.HasPrefix(request.URL.Path, s.path) {
s.invalidRequest(writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
return
}
if s.method != "" && request.Method != s.method {
s.invalidRequest(writer, request, http.StatusNotFound, E.New("bad method: ", request.Method))
return
}
writer.Header().Set("Cache-Control", "no-store")
for key, values := range s.headers {
for _, value := range values {
writer.Header().Set(key, value)
}
}
var metadata M.Metadata
metadata.Source = sHttp.SourceAddress(request)
if h, ok := writer.(http.Hijacker); ok {
var requestBody *buf.Buffer
if contentLength := int(request.ContentLength); contentLength > 0 {
requestBody = buf.NewSize(contentLength)
_, err := requestBody.ReadFullFrom(request.Body, contentLength)
if err != nil {
s.invalidRequest(writer, request, 0, E.Cause(err, "read request"))
return
}
}
writer.WriteHeader(http.StatusOK)
writer.(http.Flusher).Flush()
conn, reader, err := h.Hijack()
if err != nil {
s.invalidRequest(writer, request, 0, E.Cause(err, "hijack conn"))
return
}
if cacheLen := reader.Reader.Buffered(); cacheLen > 0 {
cache := buf.NewSize(cacheLen)
_, err = cache.ReadFullFrom(reader.Reader, cacheLen)
if err != nil {
conn.Close()
s.invalidRequest(writer, request, 0, E.Cause(err, "read cache"))
return
}
conn = bufio.NewCachedConn(conn, cache)
}
if requestBody != nil {
conn = bufio.NewCachedConn(conn, requestBody)
}
s.handler.NewConnection(request.Context(), conn, metadata)
} else {
writer.WriteHeader(http.StatusOK)
conn := NewHTTP2Wrapper(&ServerHTTPConn{
NewHTTPConn(request.Body, writer),
writer.(http.Flusher),
})
s.handler.NewConnection(request.Context(), conn, metadata)
conn.CloseWrapper()
}
}
func (s *Server) invalidRequest(writer http.ResponseWriter, request *http.Request, statusCode int, err error) {
if statusCode > 0 {
writer.WriteHeader(statusCode)
}
s.handler.NewError(request.Context(), E.Cause(err, "process connection from ", request.RemoteAddr))
}
func (s *Server) Network() []string {
return []string{N.NetworkTCP}
}
func (s *Server) Serve(listener net.Listener) error {
if s.tlsConfig != nil {
if len(s.tlsConfig.NextProtos()) == 0 {
s.tlsConfig.SetNextProtos([]string{http2.NextProtoTLS, "http/1.1"})
} else if !common.Contains(s.tlsConfig.NextProtos(), http2.NextProtoTLS) {
s.tlsConfig.SetNextProtos(append([]string{"h2"}, s.tlsConfig.NextProtos()...))
}
listener = aTLS.NewListener(listener, s.tlsConfig)
}
return s.httpServer.Serve(listener)
}
func (s *Server) ServePacket(listener net.PacketConn) error {
return os.ErrInvalid
}
func (s *Server) Close() error {
return common.Close(common.PtrOrNil(s.httpServer))
}